Weekly Topic 10.12.27 Issue 9: What is the basis for replacing methanol synthesis catalysts?
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This post was last edited by fossil-zhang on 2011-1-11 14:01. What is the basis for replacing the methanol synthesis catalyst?
Methanol production, crude alcohol mass, hot spot temperature, catalyst pressure drop.
Generally, catalyst poisoning and the need to replace the catalyst after prolonged use are common issues; obvious signs include an increase and shift downward in the hotspot temperature, a significant drop in conversion rate, increased levels of CO and CO2 at the outlet, and rising system pressure.
Methanol yield, system pressure, hotspot temperature, catalyst usage time and the cycle for major system maintenance, temperature of the methanol catalyst and the level of impurities in crude methanol, system pressure drop
There is no room for an increase in the catalyst’s hot spot temperature; the one-way conversion rate decreases, production drops significantly, and impurities in the crude alcohol increase.
The methanol catalyst has reached the end of its service life (the hotspot temperature is at the upper limit of the catalyst’s active temperature), resulting in a decrease in the yield of crude methanol, an increase in the resistance of the catalyst bed, and an elevation in system pressure.
This can be attributed to the inability to raise the catalyst temperature, resulting in lower production, as well as an increase in the vent gas at the back of the tower, which leads to an increase in system pressure.
Generally, it is due to catalyst poisoning or the need to replace the catalyst after long-term use
Generally, it is caused by catalyst poisoning and prolonged use; obviously, the hot spots rise and shift downward, the conversion rate drops significantly, the levels of CO and CO2 at the outlet increase, and the system pressure rises.
Reply 1# Qingfeng Liushui: Based on production efficiency!
Under normal circumstances, factors such as methanol production volume, impurity content in crude methanol, synthesis pressure, and catalyst bed temperature are considered. Other causes of accidents include: poisoning, severe overheating, flooding, and other such incidents.